Final rendered image is completely transparent
The reason you don't see anything when you render is because your **Active Camera** is set to something different than the camera (in this case is set as the Area light).

Select your camera, make it active and your scene will render correctly.

You can do this two different ways:

Selecting the camera in the scene section of the properties window.



Or selecting your camera in the 3D viewport and pressing CtrlNumpad 0
(or on the view menu->Cameras->Select Active object as Camera)